Class Action
Makkai v. Databricks/MosaicML
Rebecca Makkai, Stewart O'Nan, Jason Reynolds, et al. v. Databricks, Inc. & MosaicML, Inc. (In re Mosaic LLM Litigation)
Where it stands
On April 23, 2026 the court denied the defendants' motion to dismiss, holding the authors' allegations sufficient at the pleading stage; the consolidated case remains in discovery with summary judgment briefing running through mid-2026.
Key ruling
April 23, 2026 — motion to dismiss denied; the court wrote that defendants 'may ultimately prevail on this issue, but for now, Plaintiffs' allegations are sufficient.'
What is not confirmed
One secondary report names the presiding judge as 'Charles B. Dreyer,' which appears to be a garbled rendering (N.D. Cal. Judge Charles R. Breyer is listed elsewhere as presiding over In re Mosaic LLM); the judge should be re-verified.The record
- Court
- N.D. Cal.
- Case number
- 3:24-cv-02653 (consolidated as In re Mosaic LLM Litigation, 3:24-cv-01451)
- Filed
- 2024-05-02
- Defendants
- Databricks, Inc. · MosaicML, Inc.
- Plaintiffs
- Putative class of book authors whose works allegedly came from the Books3 dataset used to train MPT and DBRX
- Technology at issue
- MosaicML MPT and Databricks DBRX large language models
- Relief sought
- Class-wide statutory and actual damages plus injunctive relief
- Counsel of record
- Joseph Saveri Law Firm, LLP
Claims pleaded
Sources (3)
- Authors' Copyright Suit Against Databricks Will ContinuePublishers Lunch (Publishers Marketplace) · 2026-04-24
- Databricks, Inc. Large Language Model LitigationJoseph Saveri Law Firm, LLP · 2024-05-02
- Status of all 57 copyright lawsuits v. AI (Oct. 26, 2025)Chat GPT Is Eating the World · 2025-10-26
This page describes a publicly filed case. This site is not counsel on this matter, nothing here is legal advice, and the allegations described are allegations unless a court has said otherwise.